Recent content by cmpct_cmpr

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    Xiaoxiang BMS app showing 95% SOC in the morning when it was at 55% yesterday?

    Thanks, gonna give it a try. I had decent readings for a few days though. Could see how much was put into the battery during the day, used some appliances, could see the numbers going down. Seems that some kind of reset happened, that set the percentage to almost 100%.
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    Xiaoxiang BMS app showing 95% SOC in the morning when it was at 55% yesterday?

    Hi folks, I am monitoring my DIY 230Ah LiFePO4 battery bank with the Xioxiang App (iOS). It builds a Bluetooth connection to the JBD-SP04S028-L4S-150A BMS. Yesterday evening the SOC was around 55%, this morning it was 95%, at > 200 Ah, while it was at around 145 Ah last night. As I can...
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    Replaced 75AH SLA with 320AH LiFePo4 in my RV, now this…

    Yes, it is German. The E-Bloc is called CALIRA EVS 30/18, I didn’t open it, but found a manual online, which is in German, too, I‘ll post a link: https://www.cabotron-elektronik.de/app/download/7765268/BAN_EVS_30_18_DS_IU.pdf
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    Replaced 75AH SLA with 320AH LiFePo4 in my RV, now this…

    This is obviously what my electrobloc thinks about this :D
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    Replaced 75AH SLA with 320AH LiFePo4 in my RV, now this…

    Thanks for your reply. It is not the BMS though, there‘s no short in the logs, and the sound of the relay comes from the electrobloc. I can‘t disable it without going into the electrobloc, which I‘d rather not do. In my fantasy, the paralleling of the two batteries causes a high amperage, so...
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    Replaced 75AH SLA with 320AH LiFePo4 in my RV, now this…

    Hi folks, with the help of Will‘s videos and this forum, I was able to build a 12V 320AH LiFePo4 battery bank. I replaced the old sealed Lead Acid 12V 75AH battery in my RV, a 2001 Knaus Sun Traveller, based on a Fiat Ducato. I have 200W of solar Panels on the roof, that charges the battery...
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    shortened my cells - how to check if damaged?

    4 x 280 Ah LiFePo4 cells in serial, see image. When screwing down cables to the main positive pole (cell 4), I let the wrench slip and it shortened cell 4... It was about 1 second, sparks, then the wrench fell down. Sh**! How can I test if the cell(s) took damage? How probable is this...
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    3D-printing a Simple Battery Box for 4 x 280 Ah Cells - anyone done this?

    Hi everyone, I remember reading here on this forum that some people 3d-printed cases for their DIY battery banks. I'd like to pack my 4 280-Ah-cells and a BMS into such a box. Nothing fancy, just a simple box with 310 x 230 x 200 mm (L x W x H) INSIDE dimensions. The lid could be fixed with...
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    Top Balancing - this will take ages?!? Did I miss something?

    Thank you everyone! It took me some time to get back to the cells. Followed the tutorial, built them up serially with bms and charged with 14.6 V, then paralleled the cells and continued at 3.65 V. Amperage went down to about 0.020 after a full day. Disconnected to power supply after some more...
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    Top Balancing - this will take ages?!? Did I miss something?

    Hello all, I'm starting building my first LiFePo4 battery from 4 prismatic cells. Having watched Will's video on top-balancing, I connected my cells in parallel and hooked them to my power adapter at 3.65 V. Within 3 hours, it went from 3.553 down to 3.392 A, but it has to go down to 0...
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    12V 560Ah LF280 Campervan under Front Seat Battery Pack

    This looks great, @MatMat! Have fun!
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    Fatal accident caused by loose panel on road

    I glued my flexi-panels directly to the roof of my vehicle with Dekasyl MS-5, a "sylil modified polymer power glue" - whatever that is. I was reluctant at first, would they really stay up there? Last month, one of the panels had a damage (no idea how that happened), and as it had warranty, I...
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    please advise: building my 1st 12V LiFePo4 battery for my RV

    Thanks for that heads-up, @DavidHouse. Too bad they sent you damaged cells. I think I will look for a different seller.
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